package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * ClassName: OrderServiceImpl
 * Package: com.itheima.reggie.service.impl
 * Description:
 *
 * @Author www.youkewang.top
 * @Create 2023-11-11 2:17
 * @Version 1.0
 */
@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private OrderService orderService;
    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    @Override
    public void submit(Orders orders) {
        /**
         * 1、获取当前用户id
         * 2、查询当前用户的购物车数据、查询用户数据、查询地址数据
         * 3、向订单表插入数据，单条数据
         * 4、向订单明细表插入数据，多条数据
         * 5、清空购物车数据
         */
        Long currentId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, currentId);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        if (list == null || list.size() == 0) {
            throw new CustomException("购物车为空，不能下单!");
        }

        User user = userService.getById(currentId);
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if (addressBook == null) {
            throw new CustomException("用户地址信息异常,不能下单!");
        }

        long orderId = IdWorker.getId();  // 通过IdWorker工具类生成订单号

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = list.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        orders.setUserId(currentId);
        orders.setNumber(String.valueOf(orderId));
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(currentId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        this.save(orders);
        orderDetailService.saveBatch(orderDetails);
        shoppingCartService.remove(queryWrapper);
    }
}
